Los Angeles, CA (KTLA) — Video shows a man in a MAGA hat being detained after people arguing over President Trump were blasted with pepper spray Saturday on the Santa Monica Pier.

A witness who is a KTLA employee caught the incident on camera.

The Santa Monica Police Department said they received reports that a young man used a large canister of pepper spray marketed as bear repellent in an attack on four to six people at the pier around 1:20 p.m. It’s unclear if that’s the same person seen being detained after the incident.

The crowd — some holding Trump flags and U.S. flags, others holding orange posters that read “Trump Pence Must Go” — appear to be involved in an argument before the the substance is sprayed at the panicked crowd.

Many ran away screaming and coughing. One woman was vomiting, the witness said.

A crowd of what appeared to be anti-Trump protesters were seen chanting near the beach before moving to the pier and surrounding a small group of Trump supporters. People in the crowd were then seen pushing each as a scuffle broke out.